Lock and pull for sliding doors.



" PATENTED MAR. 24, 1903.

A.-J. BUTLER;

LOCK AND PULL FOR SLIDING DOORS.

APPLIOATION FILED MAY 16, 1902llllllllllllllllllllllllllllllllllllllllllll I R0 MODEL WT JEEEE UNITEDST TES PATENT FFICE.

ALFRED J; BUTLER: OF BOSTON, MASSACHUSETTS.

LO CK AND' PULL FOR SL IDING DOOR-S.

SPECIFICATION forming part of Letters Patent No. 723,239, dated March24, 1903. V

Application filed May 1a, 1902. at; No. 107,556. on, model.)

To aZZ whom it may concern:

being so constructedas to provide a pullhandle by means of which one ofsaid doors may be moved.

The object of the invention is further to provide a lock of thecharacter described so constructed as to be capable of being arranged toleave a smooth face upon the front ,edge of each door without anyprojections.-

Theinvention consists in a casing, a latchbolt pivoted thereto, saidlatch-bolt provided with a pull-handle normally projecting beyond saidcasing, a lever pivoted to said casing above said latch-bolt, oneend ofsaid lever projecting into a slot provided in the front of said casing,the other end arranged to engage a projection upon said latch-bolt andlock said latch-bolt inside of said casing in such a position that saidhandle will not project beyond thefront face of the casing,

thus leaving a perfectly smooth front edge to the door in which saidcasing is inserted.

The invention. again consists in means whereby a latch-bolt of theconstruction hereinbefore set forth is locked with the pull-handleprojecting fromthe casing into and in engagement With alatch-plate fastto the opposite door of a pair of doors by a bolt, the key operatingsaid bolt being so located as to prevent a rotary handle, by means ofwhich said latch-bolt is rotated, from rotating until said key shallhave been withdrawn from the lock, thus making it impossible to push thesliding door backwardly and bring the projecting key into contact withthe casing of the door.

The invention finally consists in the combination and arrangement ofparts set forth in the following specification, and particularly pointedout in the claims thereof.

Referring to the drawings, Figure 1 is a vertical section, partly inelevation, illustrating my improved lock in connection with a portion ofa pair of sliding doors, said doors being closed and the lock beingshown in engagement with the catch-plate and the doors thus lockedtogether. Fig. 2 is a view similar to Fig. 1, showing-the deviceunlocked. Fig. 3 is a front elevation of my improved lock, showing thesame attached to a door. Fig. 4 isa right-hand side elevation of thesame. Fig. 5 is a transverse vertical section taken on line 5 5 of Fig.2.

Like numerals refer to like parts throughout the several views of thedrawings.

In the drawings, 8 is arectangular casing inserted in a recess formed inthe door 9 and fastened thereto by screws 10 10, extending through thefront plate 11 of said casing. A catch-bolt 12 is fast to a shaft 13,extending transversely of the casing 8, and is arranged to rock inbearings 15 in the side plates 14 14. thereof. The shaft 13 is square incross-section where it extends throughthe-catch-bolt 12 and is turned toform a cylindrical shank 16 at eachend thereof,which projects throughplates 17'17,fast to opposite faces of the door 9. Said plates 17 areprovided with recesses 18 to receive rotary handles 19 19, each of saidrotary'handles being fast to one of the cylindrical shanks 16 of theshaft 13. i

l The catch-bolt 12 is provided with a pullhandle 20, preferablysubstantially triangular in shape, having threesides 21, 22, and 23surrounding a space adapted to receive the fingers of the hand,which maybe inserted through said space and aiford a convenient means for movingthe door. The said catchbolt '12 normally stands in the position shownin Fig. 1, the center of gravity of the handle being at all timeslocated at the left of the shaft 13, thus causing said catch-bolt todrop by the attraction of gravity to the position shown in Fig. 1. it isvery desirable that the pull-handle 20 should not project beyond thefront edge of the door to which said catch-bolt is attached, and in Fig.2 said catch-bolt, togethenwith the pull-handle 20, is shown turnedupwardly into the interior of the casing 8, being held in the positionshown in'Fig. 2 by a lever 24, pivoted at 25 to the casing 8. 3 Theleft-hand end of thelever 24 projects through a slot 26 in theguide-plate 27 and into a slot 28 in the front plate 11 of the casing 8.The right-hand end of the lever 24 engages a projection 29 When thedoors are open,

upon the upper end of the side 23 of the pullhandle 20, thus holding thecatch-bolt 12 in the position shown in Fig. 2. If it is desired todisengage said catch-bolt, allowing it to drop into the position shownin Fig. l, the lever 24 is tipped upon its pivot 25 by depressing thethumb-piece 30 upon said lever.

A catch-plate 33 is fast to the door 31 and is provided with a slot 32,extending vertically therethrough, said slot being normally closed by aplate 34, pivoted at 35 to said catch-plate 33. When the doors 9 and 31are closed against each other, the pull-handle 2O enters the chamber 36,provided in the door 31, through the slot 32, pushing the plate 34 intothe position shown in Fig. 1, the front edge of the side 21 of saidpull-handle riding upwardly on the lower end of said slot and theprojection 37 upon the under side of said handle finally dropping downupon the rear face of the plate 33,as shown in Fig.1. The two doors arethuslocked together by the catchbolt 12, and said catch-bolt is rigidlyfastened in the position shown in Fig. l by a bolt 38, arranged to slidetoward the right and left, Figs. 1 and 2, in ways 46, formed upon theinterior of the casing 8, and being moved by a key 39, inserted fromeither side ofthe casing 8 through a keyhole 40, Fig. 4. By turning thekey to the left the left-hand end ofthe bolt 38 enters a notch 41,provided in the catch bolt 12, and thus holds the said catch-boltrigidly fastened in the position shown in Fig. 1. It will be seen thatthe rotary handle 19 cannot be turned toward the right, Fig. 4, todisconnect the catch-bolt from the catch-plate without first Withdrawingthe key 39, so that with my improved device it Will be impossible topush the doors back and bring the key in contact with thecasingsurrounding the door,thusimpairing the casing and bending orbreaking the key in the lock. When the catch-bolt 12 is thrown into theposition shown in Fig. 2, the side 23 rests against the stop-pin 42 andthe side 21 projects into and substantially closes the slot 45 in thefront plate 11. It will be seen that the lever 24 is pivoted to the leftof the center of said lever, Figs. 1 and 2, so that the weight of theright-hand portion of the lever causes said lever to engage theprojection 29 upon the catch-bolt 12, and also it will be seen that theweight of the catchbolt 12, being largely to the left of the shaft 13,causes said catch-bolt to drop to the position shown in Fig. 1 bygravity; but, if desired, a spring 43 (shown in dotted lines, Figs. 1and 2) may be used to actuate the lever 24, and a spring 44 (also shownin dotted lines, Figs. 1 and 2) may be used to actuate the catch-bolt12.

The operation of the device is as follows: Assuming the doors 31 and 9to be separated and the pull-handle 20 projecting from the casing 8, thesaid doors are pushed together. The pull-handle enters the chamber36,'and the projection 37 drops to the position shown in Fig. 1,engaging the rear face of the catchplate 33. If desired, the key 39 isthen inserted and the bolt 38 thrown from the position shown in Fig. 2to that shown in Fig. 1, engaging the notch 41 in the catch-bolt12, andthus rigidly locking the doors together. Upon unlocking the doors thebolt 38 is thrown from the position shown in Fig. 1 to that shown inFig. 2 by means of the key 39. Said key is then withdrawn, the handle 19rotated toward the right, rocking the catch-bolt 12 from the positionshown in Fig. l to that shown in Fig. 2, where said catch-bolt is heldinside said casing by the lever 24 dropping upon the projection 29, theplate 34 drops into position, closing the slot 32 in the catch-plate 33,and the side 21 closes the slot 45 in the front plate 11, thus leavingthe front edge or face of each door smooth and free from projectionswhen the doors are open.

While I have illustrated and described my improved lock for slidingdoors as applied to a pair of sliding doors, it is evident that the samemay be applied to a single sliding door, and the catch-plate instead ofbeing attached to another sliding door may be fastened to a stationarypost or frame without departing from the spirit of my invention.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

1. In a look, a casing, a latch-bolt pivoted thereto, .said latch-boltprovided with a pullhandle normally projecting beyond said casing, alever pivoted to said casing above said latch-bolt, one end of saidlever projecting into a slot provided in the front of said casing, theother end arranged to engage a projection upon said latch-bolt and holdsaid latch-bolt inside said casing in such a position that said handlewill not project therebeyond.

2. In a look, a casing, a latch-bolt pivoted thereto, said latch-boltprovided with a pullhandle, a bolt ing and hold said latch-bolt in itsnormal position, with said handle projecting beyond said casing, and alever pivoted to said casing and arranged to engage and hold saidlatch-bolt inside said casing in such a posi tion that said handle willnot project therebeyond.

3. In a look, a casing, a shaft extending transversely thereof, alatch-bolt fast to said shaft upon the interior of said casing, providedwith a notch, a rotary handle fast to said shaft upon the exterior ofsaid casing, said latch-bolt provided with a pull-handle, a boltarranged to slide in ways formed upon the interior of said casing andentering said notch to hold said latch-bolt in its normal position, withsaid pull-handle projecting beyond said arranged to slide in saidcascasing, said slide-boltadapted to be operated 1 by a key projectinging across the handle for the laterally from said caspurpose specified.

path of rotation of said rotary 4. In alock, a casing adapted to beattached to one of a pair of sliding doors, a catch-plate adapted to beattached to the other of said pair of doors and provided with a slot inits front face, a latch-bolt provided with a pullhandle normallyprojecting beyond said casing and arranged to enter said slot, saidpullhandle provided with a projection thereunder arranged to engage saidcatch-plate, and a lever pivoted to said casing above said pullhandleand arranged to engage a projection Iupon said pull-handle and hold saidcatch- 10 bolt and handle inside said casing.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

ALFRED J. BUTLER. Witnesses:

CHARLES S. GOODING, ANNIE J. DAILEY.

